I needed to break his train of thought.

The chancellor seemed annoyed that Grant had broken his train of thought.

This broke her train of thought and she brightened up.

I clearly heard the girl break her train of complaint long enough to say, "Ew, something smells in here!"

Close beside him, Shaddam heard a voice that broke his train of thought.

A commotion down the line broke his train of thought.

He called me back to the dugout and broke my train of thought.

Briefly, not wishing to break the old man's train of thought, Bass explained.

When he spoke I think it was to break my train of thought.

The memory broke her train of thought for a moment and her eyes went moist.